Samsung said it had attracted five million registered users and processed $500 million since the launch of its mobile payment service in two countries last year.

The vendor has some hardcore competition for its contactless payment service, in the shape of Apple and Google, since it debuted in South Korea and the US in August and September 2015, respectively.

However, the company did not reveal how many of its registered base were actually regular users of the service.

“We’ve already seen significant consumer adoption and we continue to see great momentum. Our aim is to expand Samsung Pay to even more locations around the world, and our customers should expect to see more features in the year to come,” said Injong Rhee, EVP and Head of R&D, Software and Services of Mobile Communications Business at Samsung Electronics.

The company is to launch the payment service in China next month (March), meaning it will be running a month behind rival Apple Pay, followed by Australia, Brazil, Singapore, Spain and the UK later in the year.  Canada will be added to the roadmap, said the vendor without being more specific.

Samsung has mentioned its intention to launch in all these countries previously.

Samsung Pay is currently available on select Galaxy devices including the S6, S6 edge, S6 edge+, Note5 as well as premium and mid-range options such as the 2016 models of both Galaxy A5 and A7.

The company will also push the payment service into new areas, beyond contactless payments, with Samsung planning to add transport passes and membership cards. Among those supported in 2016 is London’s Transport for London (TfL).